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zephyr-flash-dfu.bbclass: add reset & retries support

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Arduino-101 needs to be reset in order to enter "flash mode".
The flash window is about 5 seconds. If the flashing fails,
prompt the user to press reset.
After the device is flashed, it remains in the "flash mode"
until it is reset again, so it needs to enter the flash mode via reset
only once even if we flash images for multiple cores. So we only prompt
for reset once.

Signed-off-by: Juro Bystricky <juro.bystricky@intel.com>
This commit is contained in:
Juro Bystricky
2017-03-06 15:46:09 -08:00
parent b3b5bb99dc
commit 40cf2cedc5
1 changed files with 29 additions and 5 deletions
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34
classes/zephyr-flash-dfu.bbclass
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@@ -6,8 +6,7 @@ python do_flash_usb() {
bb.error("ERROR: dfu_util binary not in PATH")
sys.exit(1)
board = d.getVar('BOARD',True)
bb.warn("Attempting to flash board: %s" % board)
board = d.getVar('BOARD', True)
if board == 'arduino_101_sss':
iface = 'sensor_core'
@@ -19,14 +18,39 @@ python do_flash_usb() {
bb.error(" Unsupported board %s" % board)
sys.exit(2)
# We need to serialize flashing of separate images (when using multiconfig)
lock = bb.utils.lockfile(os.path.join(d.getVar('TOPDIR', True),"flash-dfu.lock"), False, True)
image = "%s/%s.elf" % (d.getVar('DEPLOY_DIR_IMAGE', True), d.getVar('PN', True))
statement = 'dfu-util -v -a ' + iface + ' -d 8087:0aba -D ' + image.replace('elf','bin')
bb.note("command: %s" % statement)
return_code = subprocess.call(statement, shell=True)
bb.plain("Attempting to flash board: %s" % board)
# Arduino-101 needs to be reset in order to enter "flash mode".
# The flash window is about 5 seconds.
# However, if the device is flashed, it remains in the "flash mode"
# until it is reset again, so it needs to enter the flash mode via reset
# only once even if we flash images for multiple cores. So we only prompt
# for reset once.
timeout = 5
promptneeded = True
while (timeout > 0):
time.sleep(0.5)
timeout = timeout - 0.5
return_code = subprocess.call(statement, shell=True)
if return_code == 0:
break
if promptneeded:
bb.warn("\n\n *** Failed to flash %s. *** \n Press reset, will retry for five seconds...\n" % board)
promptneeded = False
if return_code != 0:
bb.error("Error flashig the device [%d], reset needed?" % return_code)
bb.error("Error flashing %s [%d]" % (board,return_code))
else:
bb.warn("Success (return code %d)" % return_code)
bb.plain("Success (return code %d)" % return_code)
bb.utils.unlockfile(lock)
}
addtask do_flash_usb